■ By increasing the weight, the center of gravity, the response and centrifugal force are higher. This is perfect for the stability of the fingerboard when flies or turns. ■ By increasing the height, the the truck will move more, and the sinking will be larger and the nose will rise, so it will be easier for your fingers to get caught. ■ By using bushings that are uniquely designed, it leads to the strength of the waist without any gaps. ■ Since it is a unique integrated shaft, it will not shift even if it lands violently.